344247989 has 2 divisors, whose sum is σ = 344247990. Its totient is φ = 344247988.

The previous prime is 344247979. The next prime is 344247991. The reversal of 344247989 is 989742443.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 343805764 + 442225 = 18542^2 + 665^2 .

It is a cyclic number.

It is not a de Polignac number, because 344247989 - 2²⁸ = 75812533 is a prime.

Together with 344247991, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (344247979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172123994 + 172123995.

It is an arithmetic number, because the mean of its divisors is an integer number (172123995).

Almost surely, 2^344247989 is an apocalyptic number.

It is an amenable number.

344247989 is a deficient number, since it is larger than the sum of its proper divisors (1).

344247989 is an equidigital number, since it uses as much as digits as its factorization.

344247989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 50.

The square root of 344247989 is about 18553.9211219623. The cubic root of 344247989 is about 700.8479445370.

The spelling of 344247989 in words is "three hundred forty-four million, two hundred forty-seven thousand, nine hundred eighty-nine".